sync.profile: Point dependencies to an empty string

This means that we are going to use the same branch name for the
dependencies as the branch of the repository under test.

If we are testing the 'stable' branch, all dependencies will point
to the 'stable' branch as well.

Change-Id: I4da67e288a68fd193cb451c233a2c7c4642d4725
Reviewed-by: Iikka Eklund <iikka.eklund@digia.com>
Bump MODULE_VERSION to 5.1.1

Change-Id: Ic769eef90df7ace20e961903e1f347a6393a258a
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Merge remote-tracking branch 'origin/stable' into dev

Conflicts:
	.qmake.conf
	sync.profile

Change-Id: I304d68e33d4d54dd803163363c36d69f4ab4a5aa